Raunak Dey
Graduate Student (GTA)

BS-MS in Physical Sciences (2015-2020) from Indian Institute of Science Education and Research Kolkata (IISER K).

Research Interests

My research interest lies in the broad area of Light Matter interactions ranging from the mesoscopic level to the nano-scale. Currently I am in the Silva group where I am working on a quantum spectroscopy experiment based on entangled photons, as well as on coherent multidimensional spectroscopic techniques to probe quasi particle interactions in materials, from polymers to perovskites. My experience with these projects is in a nascent stage now.

During and after my MS in India, I worked with Optical Tweezers as a toolkit to probe the interesting Physics behind stochastic phenomena at mesoscopic length-scales. I have published on diverse topics ranging from active broadband microrheology in polymers, to correlated motion in viscoelastic media, and quantifying randomness in Markov and non-Markov processes. Alongside, I worked on non-equilibrium statistical mechanics of entropy driven micro-engines of with optically trapped probes.

The common ground between my MS and PhD topics is the study of non-equilibrium and stochastic processes using the tools of Optics. The length scale and the system have changed, but the Physics remains deeply connected. Working on these fundamental problems, my interest in instrumentation and algorithmic thinking has matured over time. Being at the one of the best Tech schools in the world, I see myself as a linear superposition of a Physicist and an engineer. To know more about me, especially to see what I do beyond science, please visit my personal webpage.

Honors and Awards:

1. DST INSPIRE Scholarship (2015-2020) awarded by the Dept of Science and Technology, India.

2. MITACS Globalink Research Internship (2019), Canada.

3. SPIE Student author conference support by MKS Instuments (2021). 



1. Frontiers in Physics, January 2021, “Simultaneous random number generation and opticaltweezers calibration employing a learning algorithm based on the Brownian dynamics of a trappedcolloidal particle”, Raunak Dey, Subhrokoli Ghosh, Avijit Kundu and Ayan Banerjee.doi:10.3389/fphy.2020.576948  (https://www.frontiersin.org/articles/10.3389/fphy.2020.576948/full)

2. Soft Matter, June 2021, Active microrheology using pulsed optical tweezers to probe viscoelasticityof Lamin A towards diagnosis of laminopathies, Chandrayee Mukherjee, Avijit Kundu, Raunak Dey, Ayan Banerjee, Kaushik Sengupta. https://doi.org/10.1101/2021.02.05.429901

3. Physical Review Fluids, December 2021, "Single-shot wideband active microrheology using multiple-sinusoid modulated optical tweezers", Avijit Kundu, Raunak Dey, Shuvojit Paul, and Ayan Banerjee. https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.6.123301

Other Publications:

1. SPIE Nanoscience + Engineering, August 2021, “Random number extraction from optically trapped Brownian oscillator in viscous and viscoelastic media using learning algorithms ”, Raunak Dey, Avijit Kundu, Subhrokoli Ghosh and Ayan Banerjee. https://spie.org/Publications/Proceedings/Paper/10.1117/12.2596502

2. SPIE Nanoscience + Engineering, “Microrheology over a broad frequency range probing multiple-sinusoid oscillating optical tweezer”, Avijit Kundu, Raunak Dey, Subhrokoli Ghosh and Ayan Banerjee. https://spie.org/Publications/Proceedings/Paper/10.1117/12.2596296

3. Bulletin of the American Physical Society “Probing medium viscoelasticity using signal transmission through coupled harmonic oscillators”, Avijit Kundu, Raunak Dey, Shuvojit Paul and Ayan Banerjee. https://meetings.aps.org/Meeting/MAR21/Session/S17.12

Memberships and Committees:

1. SPIE student member 

Works in Progress:

1. "Experimental verification of Arcsine laws in mesoscopic non-equilibrium and active systems”, Raunak Dey, Avijit Kundu, Biswajit Das and Ayan Banerjee.https://arxiv.org/abs/2104.00127v1

2. "Non-monotonic skewness of currents in non-equilibrium steady states"  https://arxiv:2201.06563